Jockers, K. Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society; MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Jockers, K., & Bonev, T. (1997). H2O+, CO+, and dust in Comet P/Swift-Tuttle. Astronomy and Astrophysics, 319, 617-629.